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Industrial processes

From Wikipedia, the free encyclopedia

Steelworks of Italy in 1958
Steelworks of Italy in 1958

Industrial processes are procedures involving chemical, physical, electrical or mechanical steps to aid in the manufacturing of an item or items, usually carried out on a very large scale. Industrial processes are the key components of heavy industry.

Chemical processes by main basic material

Certain chemical process yield important basic materials for society, e.g., (cement, steel, aluminum, and fertilizer). However, these chemical reactions contribute to climate change by emitting carbon dioxide, a greenhouse gas, through chemical reactions, as well as through the combustion of fossil fuels to generate the high temperatures needed to reach the activation energies of the chemical reactions.

Cement

CaCO3(s) → CaO(s) + CO2(g)

Steel

  • Smelting – Inside of a blast furnace, carbon monoxide (CO) is released by combusting coke (a high-carbon derivative of coal) and removes the undesired oxygen (O) within ores. CO
    2
    is released as a by-product, carrying away the oxygen and leaving behind the desired pure metal. Most prominently, iron smelting is how steel (largely iron with small amounts of carbon) is created from mined iron ore and coal.
Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)[1]

Aluminum

  • Hall–Héroult process – Aluminum oxide (Al2O3) is smelted with coke (C) in a high-temperature electrolysis reaction, yielding the desired pure aluminum (Al) and a mixture of CO and CO
    2
    .
Al2O3(s) + 3 C(s) → 2 Al(s) + 3 CO(g)
2 Al2O3(s) + 3 C(s) → 4 Al(s) + 3 CO2(g)

Fertilizer

CH4(g) + H2O(g) → CO(g) + 3 H2(g)
CO(g) + H2O(g) → H2(g) + CO2(g)
N2(g) + 3 H2(g) → 2 NH3(g)

Other chemical processes

Electrolysis

The availability of electricity and its effect on materials gave rise to several processes for plating or separating metals.

Cutting

Metalworking

Iron and steel

Moulding

The physical shaping of materials by forming their liquid form using a mould.

Separation

Many materials exist in an impure form, purification, or separation provides a usable product.

Distillation

Distillation is the purification of volatile substances by evaporation and condensation

Additive manufacturing

In additive manufacturing, material is progressively added to the piece until the desired shape and size are obtained.

Petroleum and organic compounds

The nature of an organic molecule means it can be transformed at the molecular level to create a range of products.

Organized by product

A list by process:

See also

References

  1. ^ "Blast Furnace". Science Aid. Archived from the original on 17 December 2007. Retrieved 30 December 2007.
This page was last edited on 8 March 2021, at 10:37
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